Objective: To study the pharmacokinetics and bioavailability of syringic acid(SA) in rabbits by HPLC.
Method: After the rabbits were injected SA injection via ear vein and peritoneal cavity, blood was collected also via ear vein at different time-point. Then the concentration of SA in blood was determined by HPLC and the concentration-time curve was mapped to simulate a compartment model. So the pharmacokinetic parameters were calculated out. Several days after this injection, the drug was administered to the rabbits via i.p. and using the same method, another concentration-time curve was obtained. By comparing the AUC of the two curves, bioavailability was obtained.
Results: The concentration-time curve of SA in rabbits after i.v. fitted in a two-compartment open model and the absolute bioavailability was 86.27%.
Conclusion: The results were valuable for the clinical application of new anti-endotoxic drug from Radix Isatidis.
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